The first two digits, 42, represent Hunan Province. The third number 3 represents Chenzhou City. The fourth number 6 stands for Anren County. The last two digits 00 represent the post office and its delivery area.

Anren is located in the south of Hunan Province and the north of Chenzhou City, bordering Chaling and Yanling in the east, Zixing and Yongxing in the south, Leiyang and Hengnan in the west and Hengdong and Youxian in the north. Total area 146 1. 15 km2.